Silver‐Catalyzed Chemo‐ and Regioselective Nitration of Anilides

Kianmehr, Ebrahim; Nasab, Sepideh Bahrami

doi:10.1002/ejoc.201800779

Cited by 13 publications

(9 citation statements)

References 59 publications

(59 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then some of the C atom sites are replaced by N atoms to achieve doping with nitrogen in Ti 3 C 2 T x or NO 2 terminations appear on the surface of Ti 3 C 2 T x . [22,23] Comparison between the nano-Ag@Ti 3 C 2 T x and Ti 3 C 2 T x on the distribution of element is summarized in Table S2 in the Supporting Information. It can also testify that the N appeared after AgNO 3 disintegration.…”

Section: Resultsmentioning

confidence: 99%

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Yuan

Wang

Cao

et al. 2020

Adv Materials Inter

View full text Add to dashboard Cite

For the sustainable use of energy and the reduction of environmental pollution, green and renewable energy technologies including electrocatalysis, batteries, supercapacitors and photocatalysis are subjects that need our continuous development. [5-8] Therefore, we need to design new nanomaterials for energy storage, so as to improve the efficiency of energy storage and utilization. A variety of 2D materials, including graphene, silicene, phosphorene, BP, MoS 2 , and MXene have great utilization potentiality. Among them, MXene is a series of new 2D materials discovered in 2011. [9,10] MXene is widely used in supercapacitors, lithium ion batteries, gas sensors, and electrocatalytic hydrogen production, and it has achieved excellent results. [11-13] Transition metal carbides, carbonitrides, and nitrides (MXenes) are new members of the 2D material. On account of the 2D morphology and required properties, such as hydrophilic character, tunable surface chemistry, excellent metallic conductivity, and high chemical stability, MXene has received lot of attention in the field of the energy storage and energy conversion. MXenes are produced by selectively etching out of the A layer from MAX phase (M n+1 AX n), where A comprises mostly Al and Si elements. The general formula for MXene is M n+1 X n T x (n = 1-3), where M stands for an early transition metal (such as Sc, Ti, Zr, Hf, V, Nb, and so on), X is carbon and/or nitrogen and T x represents the surface terminations. Usually the surface functional groups are hydroxyl, fluorine, and oxygen groups. [14-16] However, 2D materials usually easily self-restack and reduce surface active sites to show excellent but not outstanding electrochemical performance because of their terminations and underutilization during electrochemical process. Therefore, how to improve the surface utilization efficiency and catalytic active sites of materials, while reducing the cost, is a challenge for catalyst and electrode materials. Here, Ag nanoparticles and nitrogen atoms were rationally introduced into the MXene matrix by via an ultravioletassisted method to improve free electron number and the electron bound to generally boost the hydrogen evolution reaction (HER) catalysis and supercapacitor performance (Figure 1a). Interestingly, the prepared Ag@N-Ti 3 C 2 T x catalyst displays good overpotentials of −153.0 mV at 10 mA cm −2 To achieve highly efficient energy storage and conversion in electrochemical energy devices, the research of rationally designed method is crucial to improve performances of MXene-based catalysts and electrodes. Herein, an ultraviolet-assisted strategy is demonstrated to synthesize Ag@N-doping Ti 3 C 2 T x (Ag@N-Ti 3 C 2 T x) composites and N-promoted free electron number and the electron bound in Mxene are used to generally boost the hydrogen evolution reaction (HER) catalysis and supercapacitor performance. The prepared Ag@N-Ti 3 C 2 T x catalyst displays a high catalytic ability with an overpotentials of −153 mV and corresponding Tafel slopes (137.9 mV dec −1) lower ...

show abstract

Section: Resultsmentioning

confidence: 99%

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Yuan

Wang

Cao

et al. 2020

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…Due to their importance, a number of reliable methods for the preparation benzo[ a ]carbazole derivatives have been developed . Among them, a popular approach is to use diazo compounds as metal carbene precursors to form the required C−C bond(s) in constructing the benzo[ a ]carbazole scaffold ,,.…”

Section: Figurementioning

confidence: 99%

Selective Synthesis of Benzo[a]Carbazoles and Indolo[2,1‐a]‐Isoquinolines via Rh(III)‐Catalyzed C−H Functionalizations of 2‐Arylindoles with Sulfoxonium Ylides

et al. 2018

View full text Add to dashboard Cite

A highly chem-and regioselective synthesis of diversely substituted benzo[a]carbazoles and indolo[2,1-a]-isoquinolines through Rh(III)catalyzed cascade reactions of 2-arylindoles with sulfoxonium ylides is presented. To be specific, treatment of 2-arylindoles, 2-arylindole-3-carbaldehydes, 2-arylindole-3-carbonitriles or 2-aryl-3-methylindoles with sulfoxonium ylides under the catalysis of Rh(III) led to the selective formation of 6aryl/alkyl benzo[a]carbazoles, 5-acylbenzo[a]carbazoles, 6-amino-5-acylbenzo[a]carbazoles or 12methylindolo[2,1-a]isoquinolines, respectively. Mechanistically, the formation of the title compounds involves a cascade process including metalation of the inert C(sp 2 )ÀH bond, migratory insertion of ylide into the carbon-metal bond via an in situ carbenoid formation, protodemetalation, and condensation. To our knowledge, this is the first example in which b-carbonyl sulfoxonium ylides were used as stable carbene precursors and bifunctional C2 synthons to afford benzo[a]carbazoles and indolo[2,1-a]isoquinolines.

show abstract

“…For plausible mechanism reported by authors revealed that the reaction initiated by aryl silver complex, which formed via co‐ordination of silver nitrite catalyst and the substrate‘s acetylamino directing group and followed by n‐phenyl acetamide radical, then it reacts with NO 2 + to afford ortho nitrated product. There are several advantages of this approach such as ortho‐selectivity, high functional group tolerance with moderate to higher amount of yield [25] …”

Section: Nitration By C−h Activation Methodsmentioning

confidence: 99%

“…There are several advantages of this approach such as ortho-selectivity, high functional group tolerance with moderate to higher amount of yield. [25] Chun et al have been discovered regioselective nitration of 8-aminoquinoline amide using a palladium catalyst and tertbutyl nitrite under metal-free conditions (Scheme 18). This protocol could be applicable for various aryl, heteroaryl, and also aliphatic carboxamides substrates.…”

Section: Nitration Through Cà H Activationmentioning

confidence: 99%

Synthetic Protocols for Aromatic Nitration: A Review

Patel

2021

ChemistrySelect

View full text Add to dashboard Cite

Nitration of aromatic compounds represents a powerful and widely used transformation that allows introducing nitro group into aromatic systems. New synthetic strategies for aromatic nitration are deeply needed, including highly efficient and selective nitration methods. Aromatic nitration plays an important part in the industry, as the main use of nitration is to produce important products such as dyes & intermediate compounds, drugs, and Agrochemicals. The electrophilic aromatic nitration is most studied and important transformation in industrial process. This review will describe different possible methodologies that apply to this fundamental transformation with special attention to the most recent development that lasted from 2017–2020. The main pros and cons of recent nitration methods are briefly described with their specific reaction mechanism and highlighting the most important feature of the present aromatic nitration method.

show abstract

Silver‐Catalyzed Chemo‐ and Regioselective Nitration of Anilides

Cited by 13 publications

References 59 publications

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Selective Synthesis of Benzo[a]Carbazoles and Indolo[2,1‐a]‐Isoquinolines via Rh(III)‐Catalyzed C−H Functionalizations of 2‐Arylindoles with Sulfoxonium Ylides

Synthetic Protocols for Aromatic Nitration: A Review

Contact Info

Product

Resources

About

Silver‐Catalyzed Chemo‐ and Regioselective Nitration of Anilides

Cited by 13 publications

References 59 publications

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti3C2Tx MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti3C2Tx MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Selective Synthesis of Benzo[a]Carbazoles and Indolo[2,1‐a]‐Isoquinolines via Rh(III)‐Catalyzed C−H Functionalizations of 2‐Arylindoles with Sulfoxonium Ylides

Synthetic Protocols for Aromatic Nitration: A Review

Contact Info

Product

Resources

About

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor

Ultraviolet‐Assisted Construction of Nitrogen‐Rich Ag@Ti₃C₂T_x MXene for Highly Efficient Hydrogen Evolution Electrocatalysis and Supercapacitor